30740813 has 2 divisors, whose sum is σ = 30740814.
Its totient is φ = 30740812.
The previous prime is 30740807. The next prime is 30740819. The reversal of 30740813 is 31804703.
It is a balanced prime because it is at equal distance from previous prime (30740807) and next prime (30740819).
It can be written as a sum of positive squares in only one way, i.e., 17330569 + 13410244 = 4163^2 + 3662^2
It is a cyclic number.
It is not a de Polignac number, because 30740813 - 24 = 30740797 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (30740819) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15370406 + 15370407.
It is an arithmetic number, because the mean of its divisors is an integer number (15370407).
Almost surely, 230740813 is an apocalyptic number.
It is an amenable number.
30740813 is a deficient number, since it is larger than the sum of its proper divisors (1).
30740813 is an equidigital number, since it uses as much as digits as its factorization.
30740813 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 2016, while the sum is 26.
The square root of 30740813 is about 5544.4398274307.
The cubic root of 30740813 is about 313.2601246147.
The spelling of 30740813 in words is "thirty million, seven hundred forty thousand, eight hundred thirteen".